they offered flowers in front of a statue of mandela. people attached messages, expressing thanks to the anti apartheid leader, and praising his achievements. mourners from different ethnic groups formed long lines to sign the book of condolence. >> thankful that he's gone, but also celebrating his life, celebrating what he has done for us as his people. so just want to thank him. >> the country's leaders plan to hold a national memorial service for mandela on tuesday in johannesburg. there will be a state funeral next sunday in the eastern village of cue knew, where mandela grew up. >>> six men suspected of stealing a truck carrying a load of radioactive material in mexico are in hospital for possible radiation exposure. a group of gunmen hijacked a truck outside mexico city on monday. it was carrying a cobalt 60, a radioactive substance used for medical applications. police later found the radioactive substance about 60 kilometers away. the thieves had removed the radioactive material from its protective case. health officials say six